Tractor frame suspension



u. -MT msfw E E. W CKERSHAH -TrmcToR FRAME SusPENslom. F1 LED SEPT. 259, vHN 9,

2 SHEETS-SHEET Lmgo 2 sHETs-SHEET 2 am i559 i923.

E. E. WICKERSHAM. TRACTOR FRAMEy SUSPENSION.

Fuso SEP 29, w19.

Faienled dan- 16. 1%23.

ELMER E. WICEERSHAM, 0F STQCETGN, CALIFORIL, ASSGTR T0 FACTURING COMPANY, OF STOCKTN, CALFRNIA,

FORMA.

om: conneries; er naar TRCTR FRAHE SUSENSON.

Application led September 2S, 1919.

To all wlw-m i may concern.'

Be it known ehat l, Emma F. Villeneusi-mra. a ciizen of the United Staes. residing Stockton, in the county of San .loaquin and State of California, have invented new and useful Improvements in Tractor Frame Suspensions, of which the following is a specification.

This invention relates to chain track tractors, and more particularly to means for sus pending the main frame upon the truck mechanisms.

ln my prior application, Serial No. 314,- 205, filed July 30th, 1919, I have .shown a suspension `.vlierein the main frame is supported entirely at a single point on eacn of the truck mechanisms. The present application coneempla'res the same general method of supporting the main frame, but discloses a specifically different form of mechanism for this purpose wherein the parts have been simplified and improved. l

Referring to the accompanying' drawings:

Fig. 1 shows a plan view of a tractor embodying my invenion.

Fig. 2 shows a side elevation of the same.

Fig. 3 shows a, sectional View taken on the line 3 3 of Fig. 2.v

Fig. 4 shows a. detail view in elevation of one of the stahilizinp springs.

As-sliown herein, a tractor main iframe is indicated at 10 and is supported upon a selflaying track truck mechanism arranged :al

each side thereof. This ruck mechanism comprises in general a truck frame 11 upon which is journaled a. series of rollers 12 afd an idler sprocket wheel 13 journaled at he forward end thereof. An endless chain track 14- is carried at its forward run upon versely extending axle A16 fixed in supports? i7 on the main frame having outwardly extending Aends received in hearing members 18 on each truck frame. bracket 19 is formed on each bearing memher 18 and a laterally extending 'bracket or lug 2O is fixed to the main frame at the rear of the bracket 19. An extensible coiled `In the presen@ case this reverse aerien `been omred without sacrificing any oli che An upstr. dingA Serial Y10. 327,22.

springl 21 is inlierposed hei-Ween che luT and lnacke- 19.

ln Adie operation of the racor she frame is suppored entirely through ehe axle l upon the roller truck fram-es. location of this axle 16 is to ehe rear of? center of weight of the main frames and any endencj: of rhe main frame to drop down at its forward end is restrained by she coiled springs 21. rlfhe presence oi the driving sprocket wheels 15 at the rear of 'the main frame makes it impossible for the frana end of the main frame to he rillfed upwardly *so any irreal. extent independen'ly of 1:the roller crack frames.

lilach roller truclr frame is no rock about he axle 16 Yao permit it lo over irregularities in the surface or' the roadway. An upward movement of one of the rrucli mechanisms will move the oraclze 19 in manner lo compress the coiled snring ffl/.l and thus the rockingl movement of the itruclr mechanism is cushioned. Each truck mechanism may rock about the axle 16 withous imparting movement ro the opposite emol?. mechanism. 'ln the prior applicaion ferred to an upward movement of one lrncl mechanism tended ro imparaJ a downward moremenl; o the opposie truck mechanisi 'lmao advantages hereol. lThe main 'frame will still be supported in a substantially horizontal posilion at all rimes and il.' will like wise be cushioned. .The present mechanism is greatly simplied over the mechanism ol my prior application and is considerably easier to assemble and not so likely to rel out of repair. i i

Having thus described my invenrion, what Il claim and desire 0 secure by Leiders Patent is:

` 1, ln a vehicle. a main frame, a cha-in track truck mechanism at each side thereof. a pivotal supporting connection for the entire weight of the main frame al a single pointon each truck mechanism and yield'- ing means interposed heltween'each eraclemechanism and the main frame to saloiliae the main frame, said stabilizing means being in vertical alignment, with the pivotal supporting conneceion and permitting each truck mechanism 'to rock about poinrl of other I@ruck mechanism.

las

:i vehicle, ti. mtiiii frame.7 chain triiel-z truck mechamisir ai; euch side thereof` n supporting connectioh 'for the entire weight oft the' matin frame ate. single point on each truck mechanism, ineens to stabilize the in from@ seid Ameting permitting each truck mechanism to rock about :i` point of suiiport'withont importingl movement to the other truck.mechanism :1nd comprising ai tool; ann on eerh lrncl: mechanism in Verczzl eiigmnr-nt with seid pivotal supporting connection mid yielfliitr means interposed hetifeen the rock arm :md the moin trame.

ln :1 vehicle, u 11min frame, ii chain tink truck mechanism nt each side thereof, ai. pivotal snviiportingf connection for the exi- 'tire weight of the main frame havin;r t1

single point ol' connection with each truck nlel'llzinifiin und comprising :in axle on the main frame arranged to the rear of the center oi weight, of theI main frame and on which the truck mcchzinisms are jonrnnled and yielding menus interposed between each truck mechanism :md the mitin 'frame to stallilize the malin frame` seid stabilizing means the main iframe having' i Single point of' connection with each truck mechanism und vcompri@ing :in axle on the main linme :1rranged to the reim ot the center ol' weight of the main from@ und on which the trut-Ic ineolizimsms :tre gfnit'nzllelh means to stabilize the, man; tranne. seid ineens comprising u,

'rock arm on each truck mechanism in lvertiezil alignment with the axle und ai spring connecting the rock :i'ifm to the main rmne. n 2, vehicle, a mem trame., 1i ehem track trui-hV mechanism at each Side thereof, n snpportii'lg connection for the entire weight of toe mein trame having a. single point oi' connection with euch truck mechanism and comprising an axle on the matin frame an winged to the l'ezir of the center ol" weight of the mein frame end on which the trnrl; mechanisms are jonrniiled, means to stabilize the mein frame` said .means comprising ai rock arm on each truck mechanism in ver tical alignment withthe axle, u pressure spring acting upon said rock arm et the rear thereof and un'iihutment for the pressure spring),r formed on the main frame.

6. ln :t tractor, a mein frame. u chain track truck mechanism teach side thereof comprisin; r u truck frame on. which is journnled :i series ot' supporting rollers :md en idler sprocket wheel, means i'or supporting' the entirtl weight of the moin i'zzime at ai single point on euch of Suid tincli vframes comprising! au axle ,having zi pivotal connection with each truck frame at the rear oil the Ahitter, :1 yielding connection intel posed hetween each truck'mechanism und the malin lrixme in vertical alignment with' the axle, said connection permitting euch trol-lt mechanism, to rock about its pivotal mounting' independent of the main from@ and oi? euch other, and at driving Sprocketwheel Afor the chain track jonrnalecl directly upon the main. frame to the rear ot' the truck trame, said driving sprocket wheel :acting also to prevent a downward tilting olf the rearend of the main trane imlepeiid-v vent of the truck frames.

lili@ KERSi'iiilfl. 

